// Check browser version
var isNav4 = false, isNav5 = false, isIE4 = false
var strSeperator = "."; 
var vDateType = 3; // Global value for type of date format
//                1 = mm/dd/yyyy
//                2 = yyyy/dd/mm  (Unable to do date check at this time)
//                3 = dd/mm/yyyy
var vYearType = 4; //Set to 2 or 4 for number of digits in the year for Netscape
var vYearLength = 2; // Set to 4 if you want to force the user to enter 4 digits for the year before validating.
var err = 0; // Set the error code to a default of zero
if(navigator.appName == "Netscape") {
	if (navigator.appVersion < "5") {
		isNav4 = true;
		isNav5 = false;
	} else
	if (navigator.appVersion > "4") {
		isNav4 = false;
		isNav5 = true;
    }
} else {
	isIE4 = true;
}
function DateFormat(vDateName, vDateValue, e, dateCheck) {
// vDateName = object name
// vDateValue = value in the field being checked
// e = event
// dateCheck 
// True  = Verify that the vDateValue is a valid date
// False = Format values only
//Enter a tilde sign for the first number and you can check the variable information.
if (vDateValue == "~") {
	alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
	vDateName.value = "";
	vDateName.focus();
	return true;
}
var whichCode = (window.Event) ? e.which : e.keyCode;
// Check to see if a seperator is already present.
// bypass the date if a seperator is present and the length greater than 8
if (vDateValue.length > 8 && isNav4) {
	if (vDateValue.indexOf(strSeperator) >= 1 )
		return true;
}
//Eliminate all the ASCII codes that are not valid
var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
if (alphaCheck.indexOf(vDateValue) >= 1) {
	if (isNav4) {
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
	} else {
		vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
		return false;
    }
}
if (whichCode == 8 ) //Ignore the Netscape value for backspace. IE has no value
	return false;
else {
//Create numeric string values for 0123456789/
//The codes provided include both keyboard and keypad values
	var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
	if (strCheck.indexOf(whichCode) != -1) {
		if (isNav4) {
			if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1)) {
				alert("Invalid Date\nPlease Re-Enter");
				vDateName.value = "";
				vDateName.focus();
				vDateName.select();
				return false;
			}
			if (vDateValue.length == 6 && dateCheck) {
				var mDay = vDateName.value.substr(2,2);
				var mMonth = vDateName.value.substr(0,2);
				var mYear = vDateName.value.substr(4,4)
				//Turn a two digit year into a 4 digit year
				if (mYear.length == 2 && vYearType == 4) {
					var mToday = new Date();
//If the year is greater than 30 years from now use 19, otherwise use 20
					var checkYear = mToday.getFullYear() + 30; 
					var mCheckYear = '20' + mYear;
					if (mCheckYear >= checkYear)
						mYear = '19' + mYear;
					else
						mYear = '20' + mYear;
				}
				var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
				if (!dateValid(vDateValueCheck)) {
					alert("Invalid Date\nPlease Re-Enter");
					vDateName.value = "";
					vDateName.focus();
					vDateName.select();
					return false;
				}
				return true;
			} else {
// Reformat the date for validation and set date type to a 1
			if (vDateValue.length >= 8  && dateCheck) {
				if (vDateType == 1) // mmddyyyy
				{
					var mDay = vDateName.value.substr(2,2);
					var mMonth = vDateName.value.substr(0,2);
					var mYear = vDateName.value.substr(4,4)
					vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
				}
				if (vDateType == 2) // yyyymmdd
				{
					var mYear = vDateName.value.substr(0,4)
					var mMonth = vDateName.value.substr(4,2);
					var mDay = vDateName.value.substr(6,2);
					vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
				}
				if (vDateType == 3) // ddmmyyyy
				{
					var mMonth = vDateName.value.substr(2,2);
					var mDay = vDateName.value.substr(0,2);
					var mYear = vDateName.value.substr(4,4)
					vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
				}
//Create a temporary variable for storing the DateType and change
//the DateType to a 1 for validation.
				var vDateTypeTemp = vDateType;
				vDateType = 1;
				var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
				if (!dateValid(vDateValueCheck)) {
					alert("Invalid Date\nPlease Re-Enter");
					vDateType = vDateTypeTemp;
					vDateName.value = "";
					vDateName.focus();
					vDateName.select();
					return false;
				}
				vDateType = vDateTypeTemp;
				return true;
			} else {
				if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
					alert("Invalid Date\nPlease Re-Enter");
					vDateName.value = "";
					vDateName.focus();
					vDateName.select();
					return false;
         		}
      		}
   		}
	} else {
// Non isNav Check
		if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
			alert("Invalid Date\nPlease Re-Enter");
			vDateName.value = "";
			vDateName.focus();
			return true;
		}
// Reformat date to format that can be validated. mm/dd/yyyy
		if (vDateValue.length >= 8 && dateCheck) {
// Additional date formats can be entered here and parsed out to
// a valid date format that the validation routine will recognize.
			if (vDateType == 1) // mm/dd/yyyy
			{
				var mMonth = vDateName.value.substr(0,2);
				var mDay = vDateName.value.substr(3,2);
				var mYear = vDateName.value.substr(6,4)
			}
			if (vDateType == 2) // yyyy/mm/dd
			{
				var mYear = vDateName.value.substr(0,4)
				var mMonth = vDateName.value.substr(5,2);
				var mDay = vDateName.value.substr(8,2);
			}
			if (vDateType == 3) // dd/mm/yyyy
			{
				var mDay = vDateName.value.substr(0,2);
				var mMonth = vDateName.value.substr(3,2);
				var mYear = vDateName.value.substr(6,4)
			}
			if (vYearLength == 4) {
				if (mYear.length < 4) {
					alert("Invalid Date\nPlease Re-Enter");
					vDateName.value = "";
					vDateName.focus();
					return true;
   				}
			}
// Create temp. variable for storing the current vDateType
			var vDateTypeTemp = vDateType;
// Change vDateType to a 1 for standard date format for validation
// Type will be changed back when validation is completed.
			vDateType = 1;
// Store reformatted date to new variable for validation.
			var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
			if (mYear.length == 2 && vYearType == 4 && dateCheck) {
//Turn a two digit year into a 4 digit year
				var mToday = new Date();
//If the year is greater than 30 years from now use 19, otherwise use 20
				var checkYear = mToday.getFullYear() + 30; 
				var mCheckYear = '20' + mYear;
				if (mCheckYear >= checkYear)
					mYear = '19' + mYear;
				else
					mYear = '20' + mYear;
				vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
// Store the new value back to the field.  This function will
// not work with date type of 2 since the year is entered first.
				if (vDateTypeTemp == 1) // mm/dd/yyyy
					vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
				if (vDateTypeTemp == 3) // dd/mm/yyyy
					vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
			} 
			if (!dateValid(vDateValueCheck)) {
				alert("Invalid Date\nPlease Re-Enter");
				vDateType = vDateTypeTemp;
				vDateName.value = "";
				vDateName.focus();
				return true;
			}
			vDateType = vDateTypeTemp;
			return true;
		} else {
			if (vDateType == 1) {
				if (vDateValue.length == 2) {
					vDateName.value = vDateValue+strSeperator;
				}
				if (vDateValue.length == 5) {
					vDateName.value = vDateValue+strSeperator;
   				}
			}
			if (vDateType == 2) {
				if (vDateValue.length == 4) {
					vDateName.value = vDateValue+strSeperator;
				}
				if (vDateValue.length == 7) {
					vDateName.value = vDateValue+strSeperator;
   				}
			} 
			if (vDateType == 3) {
				if (vDateValue.length == 2) {
					vDateName.value = vDateValue+strSeperator;
				}
				if (vDateValue.length == 5) {
					vDateName.value = vDateValue+strSeperator;
   				}
			}
			return true;
   		}
	}
	if (vDateValue.length == 10 && dateCheck) {
		if (!dateValid(vDateName)) {
// Un-comment the next line of code for debugging the dateValid() function error messages
//alert(err);  
			alert("Invalid Date\nPlease Re-Enter");
			vDateName.focus();
			vDateName.select();
   		}
	}
	return false;
}
else {
// If the value is not in the string return the string minus the last
// key entered.
	if (isNav4) {
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
	}
	else
	{
		if (typeof(whichCode) != "undefined")
			vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
		//vDateName.value = whichCode + " " + strCheck.indexOf(whichCode);
		return false;
    }
}
}
}
function dateValid(objName) {
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
// var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
//strDate = datefield.value;
strDate = objName;
if (strDate.length < 1) {
return true;
}
for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
strDateArray = strDate.split(strSeparatorArray[intElementNr]);
if (strDateArray.length != 3) {
err = 1;
return false;
}
else {
strDay = strDateArray[0];
strMonth = strDateArray[1];
strYear = strDateArray[2];
}
booFound = true;
   }
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
   }
}
//Adjustment for short years entered
if (strYear.length == 2) {
strYear = '20' + strYear;
}
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
   }
}
else {
if (intday > 28) {
err = 10;
return false;
      }
   }
}
return true;
}
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}

addEvent = function(o, e, f, s){
    var r = o[r = "_" + (e = "on" + e)] = o[r] || (o[e] ? [[o[e], o]] : []), a, c, d;
    r[r.length] = [f, s || o], o[e] = function(e){
        try{
            (e = e || event).preventDefault || (e.preventDefault = function(){e.returnValue = false;});
            e.stopPropagation || (e.stopPropagation = function(){e.cancelBubble = true;});
            e.target || (e.target = e.srcElement || null);
            e.key = (e.which + 1 || e.keyCode + 1) - 1 || 0;
        }catch(f){}
        for(d = 1, f = r.length; f; r[--f] && (a = r[f][0], o = r[f][1], a.call ? c = a.call(o, e) : (o._ = a, c = o._(e), o._ = null), d &= c !== false));
        return e = null, !!d;
    }
};

MaskInput = function(f, m){
    function mask(e){
        var patterns = {"1": /[A-Z]/i, "2": /[0-9]/, "4": /[\xC0-\xFF]/i, "8": /./ },
            rules = { "a": 3, "A": 7, "9": 2, "C":5, "c": 1, "*": 8};
        function accept(c, rule){
            for(var i = 1, r = rules[rule] || 0; i <= r; i<<=1)
                if(r & i && patterns[i].test(c))
                    break;
                return i <= r || c == rule;
        }
        var k, mC, r, c = String.fromCharCode(k = e.key), l = f.value.length;
        (!k || k == 8 ? 1 : (r = /^(.)\^(.*)$/.exec(m)) && (r[0] = r[2].indexOf(c) + 1) + 1 ?
            r[1] == "O" ? r[0] : r[1] == "E" ? !r[0] : accept(c, r[1]) || r[0]
            : (l = (f.value += m.substr(l, (r = /[A|9|C|\*]/i.exec(m.substr(l))) ?
            r.index : l)).length) < m.length && accept(c, m.charAt(l))) || e.preventDefault();
    }
    for(var i in !/^(.)\^(.*)$/.test(m) && (f.maxLength = m.length), {keypress: 0, keyup: 1})
        addEvent(f, i, mask);
};

function check_date(DateField, error_str)
{
var checkstr = "0123456789";
var Datevalue = "";
var DateTemp = "";
var seperator = ".";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
var monInd = 0;
var dayInd = 0;
   if (vDateType == 3)
   		monInd = 2;
   else
   		dayInd = 2;

   DateValue = DateField.value;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
	  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
	     DateTemp = DateTemp + DateValue.substr(i,1);
	  }
   }
   DateValue = DateTemp;
   /* Always change date to 8 digits - string*/
   /* if year is entered as 2-digit / always assume 20xx */
   if (DateValue.length == 6) {
      DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); }
   if (DateValue.length != 8) {
      err = 19;}
   /* year is wrong if year = 0000 */
   year = DateValue.substr(4,4);
   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/
   month = DateValue.substr(monInd,2);
   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/
   day = DateValue.substr(dayInd,2);
   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0 ) {
   		//if (vDateType == 3)
     		DateField.value = day + seperator + month + seperator + year;
   }
   /* Error-message if err != 0 */
   else {
      alert(error_str);
      //DateField.select();
	  DateField.focus();
   }
}